One of the mysteries of the English language finally explained.
A synthetic crystal of yttrium aluminum garnet, used in certain lasers and as an imitation diamond in jewelry.
- ‘Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density applications.’
- ‘Invented in the sixties of the last century, Nd:YAG(Neodimium Doped Yttrium Aluminum Garnet) has been and continue to be the most widely used laser crystal.’
1960s: acronym from yttrium aluminium garnet.
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